Wag.com
Details: 15% off first purchase for New Customers Only. (exp. not stated)
PetStore.com
Details: 10% OFF
Jakes Dog House
Details: 15 Off any order
Pawtastic Pet Supplies
Details: Save 5% sitewide using coupon code at checkout! Ends 8/31/13.
World Pet Store
Details: $20 Off Kurgo K-9 Truck Tether plus Free Shipping on $100+